Follow up to https://codereview.chromium.org/1581473002 for Metro removal in installer

chrome/common/chrome_constants.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_version.h"
 
 #define FPL FILE_PATH_LITERAL
 
@@ skipping 105 matching lines @@
 const base::FilePath::CharType kHelperProcessExecutablePath[] = FPL("chrome");
 #endif  // OS_*
 
 #if defined(OS_MACOSX)
 const base::FilePath::CharType kFrameworkName[] =
     FPL(PRODUCT_STRING " Framework.framework");
 #endif  // OS_MACOSX
 
 #if defined(OS_WIN)
 const base::FilePath::CharType kBrowserResourcesDll[] = FPL("chrome.dll");
-const base::FilePath::CharType kMetroDriverDll[] = FPL("metro_driver.dll");
 const base::FilePath::CharType kStatusTrayWindowClass[] =
     FPL("Chrome_StatusTrayWindow");
 #endif  // defined(OS_WIN)
 
 const char    kInitialProfile[] = "Default";
 const char    kMultiProfileDirPrefix[] = "Profile ";
 const base::FilePath::CharType kGuestProfileDir[] = FPL("Guest Profile");
 const base::FilePath::CharType kSystemProfileDir[] = FPL("System Profile");
 
 // filenames
@@ skipping 94 matching lines @@
 // user can select for different file types.
 // {2676A9A2-D919-4FEE-9187-152100393AB2}
 const char kApplicationClientIDStringForAVScanning[] =
     "2676A9A2-D919-4FEE-9187-152100393AB2";
 
 const size_t kMaxMetaTagAttributeLength = 2000;
 
 }  // namespace chrome
 
 #undef FPL